Origins of Life: RNA or DNA or both?

I have written about this scientific question before. How did DNA (more stable than RNA) come to be the primary information-store for living things?

Because we don’t have access to the early Earth, the question of how life arose on our planet remains obscure. But here is a new experimental result. The authors address the question of how RNA and DNA came to exist. These are of course the polymer molecules that store the information required to construct “Life”. The blueprint, if you will.

The elegant wet-lab experiments show how the letters of the RNA and DNA alphabet can be synthesized with the correct handedness (chirality for those with chemistry backgrounds) under conditions thought to exist on our Earth at the time that life originated.

The article is in Nature, so it’s behind their firewall. But the abstract is free to read.